摘要
以溶胶凝胶法在平板玻璃表面负载了TiO2薄膜,用不同浓度AgNO3溶液浸渍,然后进行了光照还原法和煅烧分解法Ag改性.以甲醛为模拟污染物,考察了两种方法改性的Ag-TiO2薄膜的光催化活性.结果表明:光照还原法在AgNO3溶液为0.1moL/L时Ag改性的TiO2薄膜催化活性最强,其催化活性是纯TiO2薄膜的2.3倍;煅烧分解法AgNO3溶液为0.05moL/L时Ag改性的TiO2薄膜催化活性最强,其催化活性是纯TiO2薄膜的2.9;分析了两种不同改性方法提高TiO2薄膜催化活性的机理.
Ag-TiO2 thin films were prepared as follows:TiO2 thin films were prepared using sol-gel method and subsequently dipped in AgNO3 solution,then they were illuminated and calcined,respectively.The photocatalytic activity of Ag-TiO2 thin films was tested using phenol degradation as the model reaction.The results indicated that when the concentration of AgNO3 solution was 0.1 moL/L,the photocatalytic activity of the photodeposited Ag-TiO2 thin films was 2.3 times of that of pure TiO2 thin films,when the concentration of AgNO3 solution was 0.05 moL/L,the photocatalytic activity of the calcined Ag-TiO2 thin films was 2.9 times of that of pure TiO2 thin films.The mechanism of two modification methods to improve activity of TiO2 thin films were analyzed.
出处
《兰州交通大学学报》
CAS
2011年第6期139-142,共4页
Journal of Lanzhou Jiaotong University
基金
甘肃省自然科学基金项目(3ZX062-B25-009)
甘肃省教育厅科研项目(20874)